a4a short research project : studying spatial effects on stock dynamics of North Sea cod and plaice in the Skagerrak

Under the scope of the a4a Initiative, the JRC is promoting cooperative activities between fisheries scientists with the aim to test, disseminate and promote a4a methods. These small Research Projects (SRP) are focussed on (i) comparing the a4a statistical catch-at- age model with results from other assessment models, and (ii) exploring research questions using case studies. The Workshop dedicated to the North Sea took place in Ispra, Italy, the 1st to the 5th of December. The main objectives were to study spatial effects on stock dynamics through the use of stock assessment models. The terms of reference of the workshop were: 1. Use the a4a stock assessment framework to study spatial effects on stock dynamics; 2. Apply the methodology to the stocks of cod in the North Sea and plaice in the Skagerrak. 3. Report to STECF and other relevant management bodies.